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Bhaskaran K, Forbes HJ, Douglas I, Leon DA, Smeeth L.Bhaskaran K, et al. Among authors: forbes hj.BMJ Open. 2013 Sep 13;3(9):e003389. doi: 10.1136/bmjopen-2013-003389.BMJ Open. 2013.PMID: 24038008Free PMC article.
Bhaskaran K, Douglas I, Forbes H, dos-Santos-Silva I, Leon DA, Smeeth L.Bhaskaran K, et al.Lancet. 2014 Aug 30;384(9945):755-65. doi: 10.1016/S0140-6736(14)60892-8. Epub 2014 Aug 13.Lancet. 2014.PMID: 25129328Free PMC article.